Hassan Abdi Dhuhulow, a Norwegian-Somali man, was identified as a suspect in the Kenyan mall attack a month ago.

NAIROBI, Kenya (AP) — Almost one month after gunmen attacked an upscale mall in Kenya, one of them has been identified as a Norwegian-Somali, officials said Friday, as charred body parts taken from a collapsed portion of the shopping center awaited forensics analysis to determine if they were the remains of the assailants.

The suspect was identified as Hassan Abdi Dhuhulow, the first time officials have confirmed having a real name of one of possibly four attackers from the Somali militant group al-Shabab who stormed the mall four weeks ago Saturday. Norwegian tax records show a Hassan Abdi Dhuhulowwas born in 1990 and was registered at an address in Larvik, southern Norway, as late as 2009.

Charred pieces of bodies, enough to fill two plastic boxes about a foot wide and across, have been recovered from the part of the Westgate Mall that had collapsed as security forces battled the terrorists, officials said Friday. Four AK-47 rifles believed to have been used by the attackers were also recovered from the rubble.

A Kenyan security official said it is possible the remains are of the attackers but it would not be definitively known until tests are carried out. The two boxes were taken to the morgue on Thursday, and on Friday Western forensic examiners arrived there and locked the boxes containing the remains, a morgue official told The Associated Press. A post-mortem was to be carried out later Friday.

FBI agents have been investigating since soon after gunmen invaded Westgate Mall in Nairobi on Sept. 21.

One man living in another Scandinavian country, who only gave his first name, Yussuf, told AP he believes he had met the Norwegian-Somali gunman at a gathering of Somali immigrants in Oslo, Norway’s capital, in 2008.

Yussuf recalled the man’s name as Abdi and said he was associated with “pretty radical” circles in Norway.

“He was mad. He didn’t feel at home in Norway,” Yussuf said, declining to give his last name out of fear of reprisals from al-Shabab sympathizers. Yussuf said he had not had any contact with the man since then but added that several people he knew thought they had recognized him in the closed-circuit TV footage of the mall attack.

“We said that it could be him when we looked at the video,” Yussuf said.

Newly released video from closed-circuit TV security cameras installed at the mall shows that four gunmen entered the mall and casually opened fire on shoppers, the beginning of a four-day siege that resulted in a massive fire and the mall’s partial collapse.

Four AK-47 rifles and 11 magazines of ammunition — all apparently used by the attackers — were also found in the mall rubble, the security official said. A rocket-propelled grenade, likely from Kenyan security forces, was also recovered. The two officials insisted on anonymity because the information has not been released publicly.

The Somali Islamic militant group al-Shabab claimed responsibility for the attack, saying it was in retaliation for Kenya sending troops into Somalia to go after the extremists. The gunmen stormed the mall just after noon on a busy shopping day. The siege, which set off heavy battles with Kenyan security forces, lasted four days and resulted in RPGs being fired inside the mall, a massive fire and the collapse of the mall’s main grocery and department store.

Al-Shabab threatened to carry out more attacks unless Kenyan withdraws its forces from Somalia, a demand Kenya’s president says will not be met. And there are indications al-Shabab may be attempting to carry out attacks in other regional countries.

Last weekend a blast rocked a home in Addis Ababa, Ethiopia in a neighborhood where many Somalis live, and officials said it may have been an accidental detonation of explosives by two Somali militants who planned to attack a soccer game.

Ethiopia’s anti-terrorism task force found a gun, grenades, explosives, a detonator and a belt at the home where the explosion took place. The jersey of Ethiopia’s national soccer team was found at the site of the explosion, in what was perhaps an indication that the would-be bombers hoped to mingle among soccer fans of a game being played last Sunday, a state TV report said.

Like Kenya, Ethiopia has troops in Somalia. So does another regional power — Uganda — where more than 70 people were killed when al-Shabab detonated bombs in Kampala in 2010 as crowds watched the World Cup soccer final on TV.

The U.S. Embassy in Kampala this week said it continues to assess reports that a “Westgate-style attack may soon occur in Kampala.” The embassy said it was sharing information with Ugandan authorities and told U.S. citizens “to exercise vigilance and to avoid public venues that attract large crowds.”

The Kenyan security forces have come under heavy criticism over allegations they looted many of the shops inside the mall during the siege. Although government officials have denied looting took place, video seen by AP shows soldiers picking items off shelves in a store that appears to be Nakumatt, and then later walking out with bags stuffed with goods.